Network diagnostic guides

Read the evidence, choose the next check, then compare a fresh run.

Using and interpreting this tool

Confirm the target and measurement point, then start the checks you need. Results retain sources, observation times and missing-data reasons. Traffic-intensive checks require a separate start.

After changing one setting, start a fresh run and compare A/B snapshots in history. Unknown, unconfigured and inapplicable do not mean passed.

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